Mandevilla plant named ‘OOSMANWHI1’

ABSTRACT

A new and distinct  Mandevilla  cultivar named ‘OOSMANWHI1’ which is characterized by a compact growth habit, dark green and glossy foliage, large white flowers that are lightly suffused with pink, a dark yellow corolla tube, a prolific and continuous bloom habit, as well as the stability of these characteristics from generation to generation.

Latin name of the genus and species: The Latin name of the genus andspecies of the novel variety disclosed herein is Mandevilla sanderi(Hemsl) Woodson.

Variety denomination: The inventive variety of Mandevilla disclosedherein has been given the variety denomination ‘OOSMANWHI1’.

CROSS REFERENCE TO RELATED APPLICATIONS

This application claims priority to the Community Plant Variety Rightsapplication number 2015/2462, filed Oct. 26, 2015, which is hereinincorporated by reference.

BACKGROUND OF THE INVENTION

Parentage: Over the course of many years, the inventor sourced variousMandevilla sanderi (all non-patented) plants with flower colors rangingfrom white to pink to red. From this plant material, the inventor madeselections of individual plants as well as single branches of individualplants, based on flower color, earliness of flowering, compactness ofthe plant, persistence of flowering, persistence in keeping flower colorduring the flowering. Many individual varieties were identified, andsome were isolated for further evaluation. The candidate variety is theresult of this selection process, and was first observed in May of 2014in Westland, The Netherlands.

Asexual Reproduction: Asexual reproduction of the new cultivar‘OOSMANWHI1’, by way of softwood stem cuttings, was first initiated inthe summer of 2014 in Westland, The Netherlands. Through more than 10subsequent generations, the unique features of this cultivar have provento be stable and true to type.

SUMMARY OF THE INVENTION

The cultivar ‘OOSMANWHI1’ has not been observed under all possibleenvironmental conditions. The phenotype may vary somewhat withvariations in environment such as temperature, day length, and lightintensity, without, however, any variance in genotype. The followingtraits have been repeatedly observed and are determined to be the uniquecharacteristics of ‘OOSMANWHI1’. These characteristics in combinationdistinguish ‘OOSMANWHI1’ as a new and distinct Mandevilla cultivar:

-   -   1. Mandevilla ‘OOSMANWHI1’ exhibits a compact growth habit; and    -   2. Mandevilla ‘OOSMANWHI1’ exhibits dark green and glossy        foliage; and    -   3. Mandevilla ‘OOSMANWHI1’ exhibits large white flowers, lightly        suffused with pink, and a dark yellow corolla tube; and    -   4. Mandevilla ‘OOSMANWHI1’ exhibits an abundance of flowers.    -   4. Mandevilla ‘OOSMANWHI1’ exhibits continuous flowering.

BRIEF DESCRIPTION OF THE FIGURES

The FIGURE illustrates, as nearly true as it is reasonably possible tomake the same in color photographs of this type, an exemplary plant of‘OOSMANWHI1’ in flower, grown in a commercial greenhouse inHonselersdijk, the Netherlands.

BOTANICAL DESCRIPTION OF THE PLANT

The following observations and measurements were made in January of 2017and describe averages from a sample set of six specimens of 3 month old‘OOSMANWHI1’ plants grown in 9 cm nursery pots grown in a greenhouse inWestland, The Netherlands. Plants were watered with overhead irrigationand fertilizer was applied using fertigation. No pest or diseasemeasures were taken.

Those skilled in the art will appreciate that certain characteristicswill vary with older or, conversely, with younger plants. ‘OOSMANWHI1’has not been observed under all possible environmental conditions. Wheredimensions, sizes, colors and other characteristics are given, it is tobe understood that such characteristics are approximations or averagesset forth as accurately as practicable. The phenotype of the variety maydiffer from the descriptions set forth herein with variations inenvironmental, climactic and cultural conditions. Color notations arebased on The Royal Horticultural Society Colour Chart, The RoyalHorticultural Society, London, 2015 (sixth edition).

A botanical description of ‘OOSMANWHI1’ and comparisons with othervarieties of Mandevilla are provided below.

-   Plant description:    -   -   Growth habit.—Compact vining perennial; broad upright.        -   Plant shape.—Obovate to broad obovate.        -   Average height from base to top of foliage.—19.8 cm.        -   Average height from base to top of the floral plane.—22.3            cm.        -   Average width.—18.6 cm.        -   Growth rate.—Low to moderate.        -   Plant vigor.—Low to moderate.        -   Propagation method.—Softwood stem cuttings; rooting is in            initiated in approximately 10 to 14 days under greenhouse            conditions.        -   Time to produce a finished plant.—Approximately 6 to 9            months, depending on pot size, is required to produce a            fully rooted and marketable plant when grown in a greenhouse            with a minimum ambient temperature of 14 degrees Celsius.        -   Disease and pest resistance or susceptibility.—Plants have            not been observed to be susceptible or resistant to            pathogens and pests common to Mandevilla sanderi.        -   Environmental tolerances.—Adapt to at least USDA Zones 10            and 12, and temperatures ranging from at least 5 degrees to            40 degrees Celsius; moderate tolerance to rain; low to            moderate tolerance to wind; low tolerance to drought.-   Root system:    -   -   General.—Freely branching; moderately dense rooting.        -   Texture.—Fibrous.        -   Color.—Light brown.-   Stem:    -   -   Branching habit.—Basally branching main stem; freely            branching with lateral branches.        -   Number of main stems per plant.—Two.        -   Number of lateral branches per plant.—Four.        -   Appearance; cross-section.—Rounded.        -   Length of lateral branches.—13.0 cm.        -   Diameter of lateral branches.—0.3 cm at the widest point.        -   Internode length on lateral branches.—2.1 cm.        -   Aspect.—Upright; angle is approximately 70 degrees from            horizontal plane.        -   Strength.—Strong.        -   Color, juvenile.—Yellow-green, nearest to RHS 144C.        -   Color, mature.—Yellow-green, nearest to RHS 146D.        -   Color at internodes.—Yellow-green, nearest to RHS 146D.        -   Texture and luster.—Glabrescent and moderately glossy.        -   Color of bark on main stems.—Greyed-brown, in between RHS            N199C and N199D.        -   Other stem characteristics.—Stems produce a milky sap when            damaged.-   Foliage:    -   -   Arrangement.—Opposite.        -   Division.—Simple.        -   Quantity.—Abundant; approximately 14 leaves per stem, as            observed.        -   Lamina.—Dimensions — 5.0 cm long and 3.7 cm wide, on            average. Shape — Oblong to obovate or ovate. Aspect — Nearly            flat; slightly reflexed. Apex — Short apiculate. Base —            Truncate. Margin — Entire; not undulated. Pubescence,            texture and luster of adaxial surface — Glabrous, smooth,            and moderately glossy. Pubescence, texture and luster of            abaxial surface — Glabrous, smooth, and moderately glossy.            Color — Juvenile foliage, adaxial surface — In between            green, nearest to RHS NN137A, and yellow-green, nearest to            RHS 147A. Juvenile foliage, abaxial surface — Yellow-green,            in between RHS 146B and 146C. Mature foliage, adaxial            surface — In between green, nearest to RHS 139A, and            yellow-green, nearest to RHS 147A but considerably darker.            Mature foliage, abaxial surface — Yellow-green, nearest to            RHS 146B, and very lightly suffused with greyed-brown, in            between RHS 199A and 199B. Venation — Pattern — Pinnate.            Venation color, adaxial surface — Yellow-green, nearest to            RHS 144A. Venation color, abaxial surface — Yellow-green, in            between RHS 145B and 145C.        -   Petiole.—Length — 0.5 cm. Width — 0.2 cm. Texture — Smooth            and glabrous. Luster — Moderately glossy. Strength —            Moderately strong. Color, adaxial surface — A combination of            yellow-green, nearest to RHS 152B, and greyed-brown, nearest            RHS N199D. Color, abaxial surface — Yellow-green, in between            RHS 145A and 145B.-   Inflorescence:    -   -   Inflorescence arrangement.—Terminal and axillary cymes            bearing 2 to 5 flowers.        -   Natural flowering season.—Spring through autumn in USDA            Hardiness Zones 10 through 12.        -   Time to flower.—Approximately 10 weeks from planting a            rooted cutting.        -   Dimensions.—7.8 cm high and 8.4 cm in diameter.        -   Quantity of flowers per inflorescence.—3 on average; varying            from 2 to 5.        -   Quantity of flowers per plan.—2.        -   Quantity of flower buds per plant.—13.        -   Quantity of flowers and flower buds per plant.—15.        -   Peduncle.—Dimensions — 1.0 cm long and 0.2 cm in diameter.            Aspect — Upward and outward; at approximately 60 degrees to            the lateral branch axis. Strength — Medium. Texture and            luster — Glabrous and moderately glossy. Color —            Yellow-green, nearest to RHS 146D.-   Bud:    -   -   Shape.—Oblong, elongated; long pointed ovoid at the distal            end.        -   Dimensions.—5.9 cm long and 1.3 cm in diameter.        -   Pubescence, texture and luster.—Glabrous, smooth and very            slightly glossy.        -   Color.—The distal one-third portion of the bud is red,            nearest to RHS 50B; the middle one-third section is            yellow-green, in between RHS 145B and 145C, and suffused            with red, RHS 51C; the proximal portion of the bud is            yellow-green, in between RHS 144B and 144C.-   Flower:    -   -   Flowering habit.—Moderately free to freely flowering.        -   Shape.—Funnelform.        -   Vertical height.—5.7 cm.        -   Diameter.—6.0 cm.        -   Diameter of floral tube.—1.7 cm, at its widest point.        -   Length of floral tube.—3.9 cm.        -   Aspect.—Flowers are outward facing.        -   Fragrance.—A faint pleasant fragrance; acidic-sweet.        -   Lastingness.—Approximately 10 days.        -   Persistent.—Self-cleaning.        -   Pedicels.—Dimensions — 0.5 cm long and 0.15 cm in diameter.            Aspect — Upward and outward; approximately 20 degrees to the            peduncle axis. Strength — Medium. Texture and luster —            Glabrous, smooth, and moderately glossy. Color —            Yellow-green, nearest to RHS 146D.        -   Petals.—Quantity of Petals — 5. Arrangement — Single whorl;            petals imbricate and fused into an elongated tube at the            base; lower 57.5 percent of the petals are fused. Shape of            petal lobes — Spatulate. Dimensions, free portion of petals            — 6.9 cm long and 2.7 cm wide. Apex — Bluntly apiculate.            Base — Truncate; fused at the base. Margin — Entire;            moderately undulated. Aspect — Moderately reflexed.            Pubescence, texture and luster of upper surface — Glabrous,            moderately velvety and slightly glossy. Pubescence, texture            and luster of lower surface — Glabrous, slightly velvety and            slightly glossy. Petal lobe color when opening, upper            surface — White, nearest to RHS N155B, and suffused with            red-purple, nearest to a combination of RHS 65B and 65D.            Petal lobe color when opening, lower surface — White,            nearest to RHS N155B, and partially suffused with            red-purple, nearest to RHS 62A. Petal lobe color when fully            opened, upper surface — White, in between RHS N155B and            NN155D, and suffused with red-purple, nearest to a            combination of RHS 65C and 65D, yet lighter. Petal lobe            color when fully opened, lower surface — White, nearest to            RHS N155B, and partially suffused with red-purple, in            between RHS 62B and 62C. Inner corolla tube color, when            fully opened — Yellow, a combination of RHS 13A and 13B,            with yellow veining, a combination of RHS 13A and 13B. Outer            corolla tube color, when fully opened — Yellow-green, RHS            N144D, with yellow-green veining, nearest to RHS N144D.        -   Sepals.—Calyx dimensions — 0.55 cm in diameter and 0.6 cm            tall. Arrangement — Sepals are free, rotate. Quantity — 5.            Shape — Narrow triangular. Sepal dimensions — 0.5 cm long            and 0.2 cm wide at the base. Apex — Narrow acuminate. Base —            Cuneate. Margin — Entire; not undulated. Pubescence, texture            and luster, upper surface — Smooth; glabrous; matte.            Pubescence, texture and luster, lower surface — Smooth;            glabrous; matte. Color when opening, upper surface —            Yellow-green, nearest to RHS 146D; upper half is suffused            with red, in between RHS 53C and 53D. Color when opening,            lower surface — Yellow-green, nearest to RHS 146D; upper            half is suffused with red, in between RHS 53B and 53C. Color            when fully opened, upper surface — Yellow-green, nearest to            RHS 146D; upper half is suffused with red, in between RHS            47C and 47D. Color when fully opened, lower surface —            Yellow-green, nearest to RHS 146D; upper half is suffused            with red, in between RHS 47B and 47C.-   Reproductive organs:    -   -   Androecium.—Stamen quantity — 5. Attachment — Adnate.            Filament length — 0.2 cm. Filament color — Yellow-green,            nearest to RHS 153D. Anther attachment — Basifixed. Anther            shape — Oblong; with longitudinal dehiscence. Anther length            — 0.9 cm. Anther width — 0.175 cm. Anther color —            Greyed-yellow, nearest to RHS 162D. Anther aspect — The five            anthers are touching at their apices, thus forming a cone of            anthers. Pollen, presence — None detected.        -   Gynoecium.—Pistil quantity — One. Pistil length — 2.1 cm.            Style length — 1.9 cm. Style color — Yellow-green, in            between RHS 145B and 145C. Stigma shape — Club-shaped.            Stigma length — 0.2 cm. Stigma diameter — 0.175 cm. Stigma            color — Yellow-green, nearest to RHS 151 D, and fading to            white at the apex, nearest to RHS 155A. Ovary color —            Yellow-green, nearest to RHS 144A.-   Seed and fruit: None observed.

COMPARISONS WITH THE PARENT PLANTS

Plants of the new cultivar ‘OOSMANWHI1’ differ from the unnamedMandevilla sanderi (Hemsl.) Woodson parent by the characteristicsdescribed in Table 1.

TABLE 1 Characteristic ‘OOSMANWHI1’ Unnamed seed parent Time to flower.Flowers 2 to 3 weeks Flowers 2 to 3 weeks later earlier than thespecies. than ‘OOSMANWHI1’. Growth habit. More compact than the Lesscompact than species. ‘OOSMANWHI1’. Flower color, at More bright white.Less bright white. anthesis. Lastingness of Longer than the species.Shorter than flowers. ‘OOSMANWHI1’. Abundance of More abundantflowering. Less abundant flowering. flowers.

COMPARISON WITH THE MOST SIMILAR MANDEVILLA CULTIVAR KNOWN TO THEINVENTOR

Plants of the new cultivar ‘OOSMANWHI1’ differ from the commercialvariety, Mandevilla ‘PATMANDEWI’ (U.S. Plant Pat. No. 24,704), in thefollowing characteristics described in Table 2 below.

TABLE 2 Characteristic ‘OOSMANWHI1’ PATMANDEWI’ Leaf size. Smaller thanLarger than PATMANDEWI’. ‘OOSMANWHI1’. Leaf attitude. Leaves are moreerect. Leaves are more relaxed. Flower color when White and suffusedwith White. fully opened. red-purple. Inner corolla tube Lighter yellow.Darker yellow. color.

That which is claimed is:
 1. A new and distinct variety of Mandevillaplant named ‘OOSMANWHI1’, substantially as described and illustratedherein.